ZAKHARENKO-SELEZNYOVA, A., et al. “MARKETING INSTRUMENTS TO INFLUENCE CUSTOMERS AS A SALES MANAGEMENT SYSTEM”. Herald of Khmelnytskyi National University. Economic Sciences, vol. 290, no. 1, Mar. 2021, pp. 44-48, https://doi.org/10.31891/2307-5740-2021-290-1-8.